We all gather facts and （） conclusions, but we have very different styles of thinking.

Plants use the carbon, along with sunlight, for growth,...

单项选择题Plants use the carbon, along with sunlight, for growth, and （） oxygen into the atmosphere in a process known as photosynthesis.

If things are going badly, the optimist acts quickly, l...

单项选择题If things are going badly, the optimist acts quickly, looking for （） and forming a new plan of action.

Some people wait for （） to come knocking. Some people s...

单项选择题Some people wait for （） to come knocking. Some people sought it out.